Standard & Poor's
- 18 April 2008 - Rating Action S&P (PDF)
- 1 April 2008 - CreditWatch (PDF)
- 21 March 2008 - Research Update (PDF)
- 22 January 2008 - S&P Reaffirm Rating (PDF)
- 18 October 2007 - S&P Reaffirm Rating (PDF)
- 20 July 2007 - S&P Annual Rating Analysis (PDF)
- 15 February 2007 - Reaffirm Neg Outlook (PDF)
- 29 June 2006 - Research Update (Neg Outlook) (PDF)
- 13 June 2006 - S&P Annual Rating Analysis (PDF)
- 6 December 2005 - S&P Research update (PDF)
- 31 May 2005 - S&P Annual Rating Analysis (PDF)
- 7 May 2004 - S&P Annual Rating Analysis (PDF)
Moody's
- 16 May 2008 - Moodys Credit Opinion (PDF)
- 14 May 2008 - Rating Action Moodys (PDF)
- 1 April 2008 - Rating under review for downgrade (PDF)
- 9 February 2007 - Reaffirm rating (part 1) (PDF)
- 9 February 2007 - Reaffirm rating (part 2) (PDF)
- 27 July 2006 - Moody's Annual Rating Analysis (PDF)
- June 2005 - Moody's Annual Rating Analysis (PDF)
- January 2007 - Moody's Annual Rating Analysis (PDF)
Current Credit Rating
Long term rating
Moody’s: A stable outlook
Standard & Poors: A1 outlook stable
Baseline credit: 7 stable outlook
Short term rating
Moody’s: P -1
Standard & Poors: A-1